Changes

In an interactive document it is useful to be able to put buttons which do specific navigation tasks. The {{cmd|button}} does precisely this, and it can be included in a layer which can be put anywhere on a page. Here is an example:

<context source=yes mode=mkiv text="This results in the following:">

\setuppapersize[A7][A7]

\stoptext

</context>

Indeed, instead of {{cmd|symbol}} one can use any other character, or even a figure with the command {{cmd|externalfigure}}.